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Khan Academy
Khan Academy: Line Integrals for Scalar Functions (Part 2)
An example of finding the surface area along a closed curve using line integrals.
Khan Academy
Khan Academy: Line Integrals for Scalar Functions: Line Integral Example 1
Video lesson showing how to visualize, set up, and solve a line integral.
Khan Academy
Khan Academy: Line Integral Example 2 (Part 1)
Line integral over a closed path (part 1). This video shows how to visualize and use line integrals to find the surface area along a closed curved. Problem is solved by using three different line integrals.